"It just didn't happen," says a man who is on trial charged with sexual violation, assault, and kidnapping.

Daniel Juan Daly, 28, a cleaner who had come to Christchurch from Nelson to look for work at the time of the alleged offences in January 2013, gave evidence in the High Court at Christchurch today on the fourth day of the trial.

Two sex workers have given evidence against him over the last three days, alleging rape, sexual violation, kidnapping, and assault using a knife as a weapon.

Daly gave evidence of meeting the first woman and going to her house where she gave him oral sex. He denied pulling her hair or using a knife to assault her, causing a nick that bled.

"That's not true. I simply didn't have a knife," Daly told the court.

When the woman's allegations were put to him by defence counsel Matt Dixon, Daly said: "It just didn't happen."

He said the first woman had not been "detained" by him. She had been with him of her own free will as they went to a visit to a nightclub. She remained in a taxi while he went to in to his hostel room to get alcohol.

He said she left the vehicle to go to the toilet while the taxi was at a service station, and Daly told the driver to drive off rather than wait for her.

Daly is charged with kidnapping, sexually violating, and twice assaulting one woman using a knife as a weapon. He is charged with kidnapping the other woman, assaulting her, five charges of sexually violating her, attempted sexual violation, and rape.

The charges relate to Daly having sex with two sex workers he met in central Christchurch on the night of January 24-25, 2013, when both women complained later of the rough treatment they had received.